The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2024
Filed:
Jun. 18, 2021
Toyo Kohan Co., Ltd., Tokyo, JP;
Kunihiro Yoshimura, Kudamatsu, JP;
Masanobu Matsubara, Kudamatsu, JP;
Marie Sasaki, Kudamatsu, JP;
Akihiro Yoshida, Kudamatsu, JP;
Kenji Yanada, Yokohama, JP;
Munemitsu Hirotsu, Yokohama, JP;
TOYO KOHAN CO., LTD., Tokyo, JP;
Abstract
There is provided a surface-treated steel sheet () comprising: a tin-plated steel sheet () obtained by tin-plating a steel sheet (); a phosphate compound layer () containing tin phosphate formed on the tin-plated steel sheet (); and an aluminum-oxygen compound layer () on the phosphate compound layer (), a main constituent of the aluminum-oxygen compound layer () being an aluminum-oxygen compound; wherein, when the 3dspectrum of tin in the aluminum-oxygen compound layer () is determined using an X-ray photoelectron spectroscopy, the ratio of the integration value of the profile derived from tin oxide to the integration value of the profile derived from tin phosphate (tin oxide/tin phosphate) is 6.9 or more.